Syzygy endgame tablebases

White is winning with DTZ 151

This is a cursed win. Mate can be forced, but a draw can be achieved under the fifty-move rule.

KQBNvKQR.pgn lichess.org

Histogram: KQBN winning vs. KQR (log scale)

Longest KQBNvKQR phases

KQBNvKQR statistics (unique positions)

White wins:
135,020,952,648 (35.3%)
Frustrated white wins:
144,700 (0.0%)
Draws:
118,050,868,220 (30.8%)
Frustrated black wins:
525,154 (0.0%)
Black wins:
129,676,991,434 (33.9%)
KQBNvKQR.json (?)